But I believe there is a meaningful difference between applying an enduring constitutional principle to a new circumstance and redefining the principle itself. A Constitution that changes its meaning according to the passions of the moment eventually ceases to function as a Constitution at all. Congress changes. If constitutional change itself is required, amendments can be added in one of two ways—a process which is intentionally difficult. They intentionally made constitutional change difficult because they recognized that temporary passions often produce permanent consequences.